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- Is this compatible with my current system?
- Will this work with my TV, speakers, or setup?
- Is this the right model for what I’m trying to do?
- Power Amplifier
- Class A B Amplifier
- Low Distortion
- Balanced Input
- Banana Connector
- Micro -HDMI / Type D
- Spade Connector
- RCA Analog
- XLR
- 3.5mm
PS Audio PMG Signature S400 Stereo Power Amplifier SILVER
The PS Audio PMG Signature S400 brings the Signature Series amplifier topology into a single stereo chassis. It delivers 200 watts per channel into 8 ohms and doubles its output to 400 watts per channel into 4 ohms, providing substantial power for high-performance loudspeaker systems.
Each channel operates with 10 watts of Class A bias for highly linear performance at lower listening levels. The S400 combines a low-feedback amplifier architecture with an active power supply engineered to remain stable under demanding dynamic loads.
With bandwidth exceeding 500 kHz and a slew rate greater than 200 volts per microsecond, the S400 is designed for fast transient response and low distortion. Balanced XLR and single-ended RCA inputs are provided, along with silver-plated binding posts and 12V trigger connectivity. The amplifier is hand assembled in Boulder, Colorado.
Features
- 200 watts per channel into 8 ohms
- 400 watts per channel into 4 ohms
- 10 watts Class A bias per channel
- Slew rate greater than 200 V/µs
- Bandwidth exceeding 500 kHz
- Low-feedback amplifier architecture
- State-of-the-art active power supply
- Balanced XLR and single-ended RCA inputs
- Silver-plated speaker binding posts
- 12V trigger input and output
- Hand assembled in Boulder, Colorado
- Silver finish
Specifications
Amplifier
- Configuration: 2-channel stereo power amplifier
- Power output: 200 watts per channel into 8 ohms
- Power output: 400 watts per channel into 4 ohms
- Class A power output: 10 watts per channel into 8 ohms
- Gain: 26.2 dB
- Input sensitivity: 2.0 V
- Frequency response: Below 10 Hz to 80 kHz, ±0.25 dB
- Bandwidth: Greater than 500 kHz
- Total harmonic distortion: Less than 0.002% typical from 20 Hz to 20 kHz at 1 watt into 8 ohms
- Damping factor: Greater than 240 at 8 ohms from 20 Hz to 1 kHz
- Crosstalk: Greater than 90 dB at 1 kHz
Connections & Power
- Single-ended inputs: One pair RCA
- Balanced inputs: One pair XLR
- Input impedance: 100 kΩ single-ended
- Input impedance: 200 kΩ balanced
- Speaker outputs: Four pairs silver-plated binding posts
- Trigger input: 3.5 mm, 5 to 15 VDC
- Trigger output: 3.5 mm, 12 VDC
- Input power: Auto voltage, 120 VAC or 230 VAC, 50/60 Hz
- Standby power consumption: Less than 2 watts
- Idle power consumption: 190 watts
Dimensions & Weight
- Dimensions (L x W x H): 16 x 17.5 x 8 inches (40.6 x 44.5 x 20.3 cm)
- Dimensions with feet and binding posts (L x W x H): 16.75 x 17.5 x 8.75 inches (42.5 x 44.5 x 22.2 cm)
- Net weight: 57.2 lb (25.9 kg)
- Finish: SILVER
What’s in the Box
- PS Audio PMG Signature S400 Stereo Power Amplifier
Product Details
- PS Audio PMG S400 - S
-
Brand New : Factory Sealed
- EFLC : 17173
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Warranty
Three Year Warranty
- Parts and Labour Warranty
- Canada-wide Coverage
- PS Audio Authorized
Returns
Easy Returns
- 30-day return window on eligible items
- Full refund issued in accordance with our return policy
About PS Audio
PS Audio is a respected American high-end audio brand known for premium DACs, amplifiers, power regenerators, and audiophile components designed to deliver exceptional musical detail and system performance. With a strong focus on clean power, advanced digital audio technology, and precision engineering, PS Audio products are trusted by serious music enthusiasts seeking a refined and immersive listening experience.
Electronics For Less Canada has proudly carried PS Audio products for many years. We offer a selection of new and open-box PS Audio products, all clearly marked and carefully inspected, allowing customers to shop confidently while enjoying premium high-fidelity audio performance and outstanding long-term value.
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